祁连山不同植被类型残体碳库贮量研究  

Carbon Storage of Plant Debris under Different Types of Vegetation in Qilian Mountains

作　　者：常宗强[1] 冯起[1] 司建华[1] 苏永红[1] 席海洋[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所阿拉善荒漠生态-水文试验研究站,甘肃兰州730000

出　　处：《山地学报》2007年第6期714-720,共7页Mountain Research

基　　金：国家自然科学基金项目(40671010;40501012);中国科学院西部行动计划(二期)项目(KZCX2-XB2-04-02);中国气象局气候变化专项项目(CCSF2007-34)。~~

摘　　要：采用野外调查测定、野外定位研究和室内分析相结合的方法,在植被类型变化较大林区,选择邻近相同海拔、坡向和土壤类型的天然林（青海云杉林、祁连圆柏林、高山灌丛林）、人工林（13 a华北落叶松）、牧坡草地和农田几种植被类型土壤为研究对象,研究了祁连山不同植被类型残体碳库贮量、组成与形成特征,结果表明：天然林残体碳总贮量为510.09~639.7 gC/m^2,农田和草地分别为71.4 gC/m^2和169.65 gC/m^2,人工林为503.75 gC/m2。天然林地上残体碳年形成量为63.48~485 gC/（m^2.a）、地下为267.8~314.3 gC/（m^2.a）,人工林地上为203.7gC/（m^2.a）、地下为187.2 gC/（m^2.a）,农田地上为47.8 gC/（m^2.a）、地下为106.4 gC/（m^2.a）,草地地上为98.3 gC/（m^2.a）、地下为147.3 gC/（m^2.a）。在不同植被类型中,从天然林到农田或草地,残体碳库贮量及形成量减小。Understanding the Carbon storage of plant debris under different types of vegetation in Qilian Mountains is essential in assessing the carbon budget of the ecosystem in the biological processes but also have a very important significance to evaluate the function and position of the terrestrial ecosystem in the global carbon cycle.The paired plots with the same elevation,the slope degree and the soil type of the natural stands（Picea Crassifolia,Sabina przewalskii and alpine scrub forest）,artificial stands,rangeland and cropland were selected as study objects in National Nature Reserves of Qilian Mountains.Based on the field survey,field orientation study and laboratory analyze and by means of comparison of difference of plant debris carbon storage among different vegetation types.The result indicate that the total debris carbon storage for natural forest,plantation of larch,cropland and rangeland is 510.09～639.7 gC/m2,503.75 gC/m2,71.4 gC/m2,169.65 gC/m2 respectively.The annual production of above-ground debris carbon for natural forest,plantation of larch,cropland and rangeland is 63.48～485 gC/（m2·a）,203.7 gC/（m2·a）,47.8 gC/（m2·a）,98.3 gC/（m2·a） respectively.The annual production of underground debris carbon for natural forest,plantation of larch,cropland and rangeland is 267.8～314.3 gC/（m2·a）,187.2 gC/（m2·a）,106.4 gC/（m2·a）,147.3 gC/（m2·a） respectively.The conversion of natural forests into cropland or rangeland will result in reduction of the debris carbon storage and the rate of its production.

关 键 词：残体碳库贮量 粗残体 细残体 植被类型 

分 类 号：Q948[生物学—植物学]